De or het roosterspanning?

The correct Dutch article is:

de roosterspanning

Rule Words ending in -ing: almost always de. See the rule

How to use roosterspanning

the roosterspanningde roosterspanning
this roosterspanningdeze roosterspanning
that roosterspanningdie roosterspanning
our roosterspanningonze roosterspanning
your roosterspanningjouw roosterspanning
every roosterspanningelke roosterspanning
which roosterspanning?welke roosterspanning?
a big roosterspanning / the big roosterspanningeen grote roosterspanning, de grote roosterspanning